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SKB-R904U20 4U Shock Mount Rack
Product #3106 | SKU 1SKB-R904U20
Out of Stock with Supplier Usually ships in 8 - 12 weeks
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SKB-R904U20 4U Shock Mount Rack

Product #3106 | SKU 1SKB-R904U20
Out of Stock with Supplier Usually ships in 8 - 12 weeks

Product Features
  • Standard 19" rack
  • Water resistant
  • Elastomer shock absorbers
  • Mount hardware in racks
Customer Reviews
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Product Details
  • Product: #3106
  • SKU: 1SKB-R904U20
Our Price $979.00 AUD

Delivery - $414.00*
8 - 12 weeks
*estimated shipping to New South Wales

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20" Support Rails for SKB-R908U20 8U Shock Mount Rack 20" Support Rails for SKB-R908U20 8U Shock Mount Rack


The SKB R904U20 4U Roto Shock Rack features a 50.8 cm deep rack frame installed in a roto moulded tough shell with an integrally moulded valance that eliminates the metal valance on the outside of the case, coupled with a rubber gasket on both the front and rear doors for water resistant protection. The integrated moulded valance, ergonomic handles, and recessed, heavy-duty twist latches allow these cases to meet most ATA and military specifications.

An internal frame mounted on adjustable Elastomer shock absorbers on all eight corners. These shocks are designed to control the effects of shock and vibration on three axes. The "sway" space around the internal frame provides natural air conditioning. This is very important for delicate audio equipment. This case is half the weight of traditional wooden cases.

This SKB-R904U20 Roto Shock Rack case has the Roto X pattern and is stackable within the series.


  • Standard 19" rack width as per EIA standards with 4 space rack height
  • Meets most ATA and Military specifications
  • Water resistant case
  • Internal frame mounted on adjustable Elastomer shock absorbers on all eight corners
  • Mounting hardware in the racks is easy with the SKB rack rail and provided hardware


Material High molecular weight Roto moulded polyethylene
Type of Closure Heavy duty twist latches
Exterior Dimensions 70.49 x 69.85 x 39.69 cm (WxDxH)
Interior Dimensions 48.26 x 50.8 x 17.78 cm (WxDxH)
Rackable Mount Depth: 58.42 cm
**Front Rail to Rear Rail:**50.8 cm
Lid Depth: 7.62 cm
Shock Absorbent Yes
Rails Front & rear
Accommodates Audio monitors, mixers and equipment with a rack mount available
Carrying/Transport Options Moulded carry handles
Weight 18.6 kg

Australian Shipping Via DHL
DHL offers a great express shipping service to Australia from New Zealand. We are proud to be able to offer express shipping to main cities on the east coast of Australia, within the same timeframe ( If not quicker ) than local Australian courier companies. Prior to the Covid-19 outbreak, service standards for these main centers was overnight. However these services have been impacted greatly, and as such the overnight service has been suspended. Overnight shipping will likely resume once things have returned to normal.

Qualifying main centers include:

  • Brisbane
  • Sydney
  • Adelaide

Whilst this service is extremely efficient and will likely be delivered within 1-2 days 99.9% of the time, it cannot be guaranteed. In the case where something were to go wrong with your delivery and it doesn’t arrive within the specified time frame, in most cases it will be delivered by the next day.

While not all major cities are eligible for overnight delivery, they still benefit from this great service. Other centers throughout Australia will have a typical delivery ETA of 2-4 days. (Excluding rural delivery address where this ETA can be extended to an additional three or more days).

If you require urgent shipping and you don’t reside in one of the cities stated above, please contact us and we can find a solution that works best for you.

Please Note: Shipping via DHL is not available to PO boxes and/ or parcel boxes etc.

In The Box

  • SKB-R904U20 4U Shock Mount Rack
  • Mounting hardware


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  • Product: SKB-R904U20 4U Shock Mount Rack
  • Manufacturer: SKB
  • Model: R904U20
  • SKU: 1SKB-R904U20
  • RM Product #: 3106